package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

		private static final String JSCODE_URL = "https://api.weixin.qq.com/sns/jscode2session";

		@Autowired
		UserMapper userMapper;

		@Override
		public User login(UserLoginDTO userLoginDTO) {
				//1 调用微信官方接口 获取微信openId(微信的唯一标识)
				Map<String, String> paramMap = new HashMap<>();
				paramMap.put("appid", "wxa2171e5220fb569a");
				paramMap.put("secret", "ab7429b9901ac6e0b018672a5b27e43d");
				paramMap.put("js_code",userLoginDTO.getCode());
				paramMap.put("grant_type", "authorization_code");
				String result = HttpClientUtil.doGet(JSCODE_URL, paramMap);
				//解析微信登录结果
				JSONObject jsonObject = JSONObject.parseObject(result);
				String openid = jsonObject.getString("openid");

				//2 判断openId是否为null,如果为null 则抛异常提示信息
				if (StringUtils.isEmpty(openid)) {
						throw new LoginFailedException("微信登录失败");
				}

				//3 先查询数据库中 openId 对应的用户是否存在
				User user = userMapper.getByopenId(openid);

				//4 不存在则新增用户
				if (user == null) {
						user = new User();
						user.setName("微信用户");
						user.setOpenid(openid);
						user.setCreateTime(LocalDateTime.now());
						userMapper.insert(user);
				}

				//5 存在则返回用户信息
				return user;
		}
}
